1916144047 has 2 divisors, whose sum is σ = 1916144048. Its totient is φ = 1916144046.

The previous prime is 1916143993. The next prime is 1916144107. The reversal of 1916144047 is 7404416191.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1916144047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1916143997 and 1916144015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1916144147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 958072023 + 958072024.

It is an arithmetic number, because the mean of its divisors is an integer number (958072024).

Almost surely, 2^1916144047 is an apocalyptic number.

1916144047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1916144047 is an equidigital number, since it uses as much as digits as its factorization.

1916144047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 1916144047 is about 43773.7826444094. The cubic root of 1916144047 is about 1242.0604070892.

The spelling of 1916144047 in words is "one billion, nine hundred sixteen million, one hundred forty-four thousand, forty-seven".